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Senior Network Specialist Security and Cisco

Job in London, Greater London, W1B, England, UK
Listing for: Onyx-Conseil
Full Time position
Listed on 2026-09-03
Job specializations:
  • IT/Tech
    Cybersecurity, Network Engineer, Network Security, Systems Engineer
Salary/Wage Range or Industry Benchmark: 70000 - 110000 GBP Yearly GBP 70000.00 110000.00 YEAR
Job Description & How to Apply Below
Position: Senior Network Specialist with Security and Cisco – City

Senior Network Specialist with Security and Cisco – City London

Our Client urgently requires a Senior Network Specialist with heavy background in Network Security on Cisco and Microsoft.

The security and support of the company’s network is paramount.

Predominately a support role (BAU) with design of scalable solutions deliverable through projects.

Encompassing numerous technologies that benefit high-availability solutions.

This role requires a responsible individual who can design and deliver secure networking solutions.

Fast thinker who can diagnose, assist others and remediate BAU support issues.

Main Aspects of the role:
  • Work within Infrastructure team in supporting and delivering all aspect of BAU and support services
  • Design, build and implement firewall solutions from perimeter to DMZ roles
  • Support IPS deployment for European branches
  • Develop, maintain and deliver global standards to all networking devices
  • Remediate Penetration Test results
  • Ensure seamless migration of network estate to newly adopted security framework
General Skills
  • Experience working within mission-critical environments
  • Experience in operational deployments

    Data centre cabling and racking of equipment
Technical Skills you need to bring to the table:
  • In-depth knowledge of CISCO including firewalls, switches and routing protocols
  • In-depth knowledge of supporting a data centre and branch interconnectivity
  • Strong technical skills are essential
  • Experience of CISCO multilayer switches and routers, including 6500s
  • CISCO certification, ideally CCNP
  • CISCO CSM
  • VLAN segregation
  • McAfee HIPS, Trend Micro
  • Centralised authentication service (AAA)
  • Safe Net Ethernet Encryptor
  • RADIUS / RSA
  • Security certification (advantageous)
You will also need to an understanding of the following technologies:

VLAN segregation. DMZ. VSS. Failover. OSPF. High availability.

CISCO. Palo Alto. Juniper. McAfee IPS. Safe Net. Tripwire.

This is a contract role for up to 18 months to start immediately.

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Position Requirements
10+ Years work experience
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